Computation of busbars local electromagnetic force densities connected to 3-pulse rectifier load over a complete cycle

All power system substations use three phase parallel busbars in the power distribution between loads. These busbars are subjected to electromagnetic forces which may cause their permanent deformation, break of insulating supports and an excess vibrational stresses applied on the busbars. From the factors affect these forces is whether the busbars currents have harmonic content or not. This paper presents an analytical approach from which overall forces and local force densities can be calculation. Busbars currents contain harmonics are used in this approach implementation. These currents are taken from a simulated model of 3-pulse rectifier, which is compared with an experimental model to give well qualitative current values.